Particle & Particle Systems Characterization

Cover image for Particle & Particle Systems Characterization

February, 2009

Volume 25, Issue 5-6

Pages 393–483

  1. Contents

    1. Top of page
    2. Contents
    3. Research Articles
    4. Instructions for Authors
    5. Calendar
    1. Contents: Part. Part. Syst. Charact. 5-6/2008 (pages 393–395)

      Article first published online: 3 MAR 2009 | DOI: 10.1002/ppsc.200990000

  2. Research Articles

    1. Top of page
    2. Contents
    3. Research Articles
    4. Instructions for Authors
    5. Calendar
    1. Order and Disorder in Powder Mixtures: Spatial Distribution Functions as Tools to Assess Powder Homogeneity (pages 397–405)

      Albert Mihranyan, Göran Frenning, Nelly Fransén, Ken Welch and Maria Strømme

      Article first published online: 9 JAN 2009 | DOI: 10.1002/ppsc.200701129

      The present work details how pair-correlation and cross-correlation functions can be used to reveal information about the spatial distribution of mixture constituents and their interactions. The constituent coordinates are extracted from SEM pictures. It is concluded that interactive mixtures of powders can be compared to disordered/amorphous solids exhibiting short-range order, whilst lacking long-range translational periodicity.

    2. A Discussion of Noise in Dynamic Light Scattering for Particle Sizing (pages 406–413)

      Hui Yang, Gang Zheng and Meng-chao Li

      Article first published online: 15 DEC 2008 | DOI: 10.1002/ppsc.200701101

      In order to acquire high quality measurement data from Dynamic Light Scattering (DLS) experiments, serious attention has to be paid to minimizing the noise involved. The noise from different sources, i.e. sample preparation, optical set-up, photodetector and correlator, is carefully examined and discussed in detail. Strategies to minimize noise in such measurements are presented.

    3. Particle Sizing with PCS Mixed of Self-beating Mode and Heterodyne Mode (pages 414–419)

      Lou Benzhuo

      Article first published online: 3 MAR 2009 | DOI: 10.1002/ppsc.200700020

      The photon correlation spectroscopy (PCS) spectrum obtained from standard dynamic light scattering experiment for particle sizing is usually a mixture of homodyne and heterodyne mode. It is demonstrated how this has to be accounted for when particle size distributions are calculated by inversion of PCS measurements.

    4. Assessing the Reliability of Particle Number Density Measurements Obtained by Image Analysis (pages 420–433)

      Paul A. Larsen and James B. Rawlings

      Article first published online: 6 FEB 2009 | DOI: 10.1002/ppsc.200701130

      Image analysis is typically biased by edge effects and particle overlap. This paper presents an estimator for particle number density that accounts for both effects. Furthermore, a single dimensionless number that correlates with the reliability of the inferred PSD is proposed which can aid practitioners in finding the proper sampling conditions to obtain accurate PSD measurements.

    5. Suspension Structure Effects on Transmission Fluctuation Spectrometry with Autocorrelation: Theoretical Prediction, Numerical Simulation and Experimental Verification (pages 434–443)

      Xiaoai Guo and Ulrich Riebel

      Article first published online: 6 FEB 2009 | DOI: 10.1002/ppsc.200701037

      Transmission fluctuation signals of radiation through a layer of monodisperse, opaque, hard spherical particles are investigated by the autocorrelation technique. By changing the autocorrelation time, a transmission fluctuation spectrum is obtained and can be applied to perform particle size analysis. A theory valid up to high concentrations is presented and is shown to give good agreement with simulations as well as experiments.

    6. Design and Testing of a Semi-Continuous Measurement System for Ionic Species in PM2.5 (pages 444–453)

      Sang bum Hong, Dae seong Kim, Sung yun Ryu, Ken W. Lee, Young jun Kim and Jai hoon Lee

      Article first published online: 6 FEB 2009 | DOI: 10.1002/ppsc.200701082

      A semi-continuous measurement system was constructed to investigate ionic species of fine particles less than 2.5  μm in aerodynamic diameter (PM2.5) in ambient air and at ca. 30  min time resolution. An intercomparison study was also performed with a standard integrated 12  h measurement technique. The results indicate that the thermodynamic stability of the species and the sampling artifacts are critical for the success of the method.

    7. Liquid-Liquid Coaxial Swirl Injector Performance Prediction Using General Regression Neural Network (pages 454–464)

      Kaveh Ghorbanian, Mohammad R. Soltani, Mehdi Ashjaee and Mohammad R. Morad

      Article first published online: 3 MAR 2009 | DOI: 10.1002/ppsc.200701104

      A general regression neural network technique was applied to design optimization of a liquid-liquid coaxial swirl injector. After training using Phase Doppler Anemometry measurements the neural network was used to predict droplet velocity and Sauter mean diameter at any axial or radial position. The results are shown to agree well with the experimental data. A general performance map of the injector is presented as well.

    8. The Effect of Grinding Media Shape on the Specific Rate of Breakage (pages 465–473)

      Dilek Cuhadaroglu, Selcuk Samanli and Sait Kizgut

      Article first published online: 6 FEB 2009 | DOI: 10.1002/ppsc.200800001

      The effect of the shape of grinding media on the breakage parameters of colemanite has been investigated in kinetic studies. In this study cylinders and spheres of different sizes are used. The results prove that the choice of grinding media is very important and depends also on the grinding time and the desired degree of grinding.

    9. Electron Backscatter Diffraction Study of Brachiopod Shell Calcite – Microscale Phase and Texture Analysis of a Polycrystalline Biomaterial (pages 474–478)

      Wolfgang W. Schmahl, Erika Griesshaber, Rolf D. Neuser, Andreas Goetz and Carsten Lüter

      Article first published online: 3 MAR 2009 | DOI: 10.1002/ppsc.200800014

      Electron backscatter diffraction (EBSD) as a highly automated microdiffraction method is used to study the structural organization in the shells of marine organisms. Three types of microstructure have been detected in brachiopod shell materials, i.e. nano to microcrystalline layers of acicular crystals, fibre composites with calcite single crystal fibres, and material formed by columnar crystals.

  3. Instructions for Authors

    1. Top of page
    2. Contents
    3. Research Articles
    4. Instructions for Authors
    5. Calendar
  4. Calendar

    1. Top of page
    2. Contents
    3. Research Articles
    4. Instructions for Authors
    5. Calendar

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